High pressure, gusty east winds and a thermal heat low will combine to raise temperatures into the upper 80s Thursday and Friday, and to about 90 degrees or a bit higher by Saturday, the warmest day of the week.

By Thursday, the warm-up begins, sending temperatures well above average for both the Willamette Valley and even the Oregon coast, where offshore winds will ease temperatures into the upper 70s in Lincoln City and Newport.

By late Saturday, winds will shift from east to west, bringing in cooler marine air, dropping Sunday's high in Portland to around 82. By Monday, temperatures slide down into the upper 70s as a weak weather system moves through bringing a slight chance of showers.